A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it.
A mountain range (mountain chain, mountain belt) is a geographic area with many mountains. A 'mountain system' or 'system of mountain ranges' includes geological features that are in the same region as a mountain range.Mountain ranges usually include highlands or mountain passes and valleys.Individual mountains in the same range do not always have the same geology or petrology.ountain ranges outside of these two systems include the Arctic Cordillera, the world's northernmost mountain system. If the definition of a mountain range includes underwater mountains, then the ocean ridges form the longest continuous mountain system on Earth, with a length of 65,000 kilometres (40,400 mi).
Mountains. [ 1 Jump to Article] 2  Mountain ranges are found all around the world and are the result of plate movement beneath the Earth's crust. Mountains can range in height from a small hill to 8,848 metres, which is the height of Mount Everest, the tallest mountain in the world. Animals that live in mountainous regions not only have to withstand dramatic temperature changes but also lower oxygen levels.